Mass per volume density.
Stones per Cubic Centimeter to Carats per Cubic Millimeter Converter — st/cm3 to ct/mm3
Convert Stone per Cubic Centimeter (st/cm3) to Carat per Cubic Millimeter (ct/mm3) using the exact conversion factor (1 stone per cubic centimeter = 31.7514659 carat per cubic millimeter). See the formula, worked examples, and conversion table.
Stones per Cubic Centimeter to Carats per Cubic Millimeter converter
Converter
Density Converter
Convert thousands of mass-per-volume density combinations for science, engineering, agriculture, and fluids.
Context values
Some unit families need one extra value for a physically accurate result.
Mass per volume density.
Result = input x 6.35029318e+6 / 200000.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Stones per Cubic Centimeter to Carats per Cubic Millimeter
Stone per Cubic Centimeter and Carat per Cubic Millimeter both measure density — mass per unit volume — a property used to identify materials, check manufacturing quality, and predict whether something floats or sinks. As a fixed reference point, water has a density of exactly 1000 kg/m³ (1 g/cm³, 1 g/mL) at its temperature of maximum density, which is why many density figures in science and engineering are quoted relative to water. Both are mass per volume density units.
Formula
carats per cubic millimeter = stones per cubic centimeter × 31.7514659
This factor comes from each unit's defined relationship to the category's base unit: 1 stone per cubic centimeter equals 6350293.18 base units, and 1 carat per cubic millimeter equals 200000 base units, so dividing one by the other gives the direct stone per cubic centimeter-to-carat per cubic millimeter factor of 31.7514659.
Simple example
1 st/cm3 × 31.7514659 = 31.7514659 ct/mm3
1 stone per cubic centimeter = 31.7514659 carats per cubic millimeter.
Real-world example
1,000 st/cm3 × 31.7514659 = 31,751.4659 ct/mm3
1,000 stones per cubic centimeter = 31,751.4659 carats per cubic millimeter.
Conversion table
| Stone per Cubic Centimeter (st/cm3) | Carat per Cubic Millimeter (ct/mm3) |
|---|---|
| 0.1 st/cm3 | 3.17514659 ct/mm3 |
| 1 st/cm3 | 31.7514659 ct/mm3 |
| 10 st/cm3 | 317.514659 ct/mm3 |
| 100 st/cm3 | 3,175.14659 ct/mm3 |
| 1,000 st/cm3 | 31,751.4659 ct/mm3 |
| 10,000 st/cm3 | 317,514.659 ct/mm3 |
Reverse conversion: Carat per Cubic Millimeter to Stone per Cubic Centimeter
31.7514659 ct/mm3 × 0.03149460888 = 1 st/cm3
31.7514659 carats per cubic millimeter = 1 stone per cubic centimeter.
stones per cubic centimeter = carats per cubic millimeter × 0.0314946088836
For a page dedicated to this direction, see Carat per Cubic Millimeter to Stone per Cubic Centimeter.
Understanding the Stone per Cubic Centimeter (st/cm3)
Mass per volume density.
Understanding the Carat per Cubic Millimeter (ct/mm3)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many carats per cubic millimeter are in 1 stone per cubic centimeter?
1 stone per cubic centimeter equals 31.7514659 carats per cubic millimeter, using the exact defined conversion factor rather than an estimate.
How do I convert stone per cubic centimeter to carat per cubic millimeter?
Multiply the stone per cubic centimeter value by 31.7514659. The converter above does this instantly to whatever precision you set.
How do I convert carat per cubic millimeter back to stone per cubic centimeter?
Use the reverse factor: 1 carat per cubic millimeter equals 0.0314946089 stones per cubic centimeter. You can also use the swap control in the converter above to flip the direction instantly.
What is a stone per cubic centimeter?
Stone per Cubic Centimeter (st/cm3) is a unit of density.
What is a carat per cubic millimeter?
Carat per Cubic Millimeter (ct/mm3) is a unit of density.
Is the stone per cubic centimeter to carat per cubic millimeter conversion exact?
Yes. Both stone per cubic centimeter and carat per cubic millimeter are defined by fixed standards rather than physical artifacts, so the factor of 31.7514659 used above is exact to as many digits as you choose to display.
What's the difference between density and mass concentration?
Density is the mass of a pure substance or material per unit volume. Mass concentration is the mass of one component — like a dissolved solute — within a mixture's total volume. The two use the same kind of units but describe different physical situations.